Car.prototype.name = 'su7'
Car.prototype.lang = 5000
Car.prototype.height = 1400

function Car(color,owner){
    // this.name = 'su7' //耦合度
    // this.lang = 5000
    // this.height = 1400
    this.color = color
    this.owner = owner 
}
let car1 = new Car('green','tian')
let car2 = new Car('yellow','li')
